of contacts all over the world. He retired in 1994, with a lecture entitled Semper aliquid novi ex Africam adferre, which may be translated as "there is always something new from Africa", and which may be regarded as Dolf's personal motto. Afterwards he continued his studies as an associate of the Leiden museum, spending most of his days in the building at the Raamsteeg and later at the Darwinweg in Leiden, where he continues to study and publish on Mollusca and other topics. In 1973, Dolf and Wenda were asked by a relative to guide a safari to Kenya and Tanzania. This became the start of an annual event that would last until 1990. The trips were soon organized by a travel agency and a group of regularly participating people, some of whom have become intimate friends of the guiding couple. Each trip was carefully prepared, with a bibliography sent to the participants. Afterwards a list of all the observed mammals and birds was distributed additionally. After 1990, Dolf and Wenda made several private trips to southern Africa, visiting friends and relatives on their way. When Dai Herbert during their 2008 trip asked if Dolf would cooperate in revising some material collected in Drakensberg Mountains, he wholeheartedly accepted the opportunity to continue with his great love: land snails of South Africa. He died 3 June 2016. Bibliography Dolf van Bruggen's wide interest in systematic biology and related fields are reflected in his numerous publications, which cover topics as diverse as marine and non-marine Mollusca, mammals, amphibians, reptiles, birds, insects, as well as zoo biology, museum collections, nature conservation, bibliographical matters, and historical accounts, apart from numerous book reviews and obituaries, to name only the fields on which he wrote more than a single contribution. The complete listing of his publication include 655 records up till 2008. The flow of publications over the years since 1948 continues to the present and has never been interrupted. Fluctuations in his production have been relatively small. On average, 11 papers appeared annually. There has never been a year with less than four papers and that happened only once. Dolf's most productive years (in number of papers) are 1960–1966, when he resided in South Africa; 1961 has been his most productive year with 23 papers. His most important scientific contributions concern the fields of malacology, entomology and botany. His botanical publications are restricted to the